Commonly used linux work + encountered problems

open port

查询端口：
firewall-cmd --permanent --query-port=20885/tcp
添加端口：
firewall-cmd --permanent --add-port=8101/tcp
删除端口：
firewall-cmd --permanent --remove-port=38085/tcp
重载：
firewall-cmd --reload
查看端口列表：
firewall-cmd --list-all

Solve the problem of insufficient permissions to start Tomcat in Linux

Solution:
1. Enter the bin directory first, execute chmod u+x *.sh (note the space after x)

2. Restart the application service on the bin command line: ./startup.sh

3. Problem solving